In this recipe I think the highlight is the artichoke. How do you make that the stand out item. In the photo you made the artichoke is present, but the potatoes are almost the same color and in the same plane. The placemat (background) is distracting (not so much the color, but the pattern). I think your lighting has improved a great deal and I think it is great to have the goal of making the cookbook and doing all the photos.
I would look for three or four slices of artichoke that are at the forefront with a balancing around them with the mint leaves and a better balance of the peas and finally the potatoes and lemon slice as sort of the base.
With that said, I took a look at your link to the Jaime Olivar page. The photos seemed very nice, what felt to me like a casual look done to perfection. So a quick search led to the photographer that Jaime uses, David Loftus.
David Loftus - About
He has a lot more variety on his page in the food section. I think there are 396 food photos. And of course he is on YouTube (a short video with a good tip):